JPH0690263A - 適応型信号変調システム - Google Patents

適応型信号変調システム

Info

Publication number
JPH0690263A
JPH0690263A JP5162018A JP16201893A JPH0690263A JP H0690263 A JPH0690263 A JP H0690263A JP 5162018 A JP5162018 A JP 5162018A JP 16201893 A JP16201893 A JP 16201893A JP H0690263 A JPH0690263 A JP H0690263A
Authority
JP
Japan
Prior art keywords
digital
output
signal
phase
amplitude
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP5162018A
Other languages
English (en)
Japanese (ja)
Inventor
Frank Chethik
チェティック フランク
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lockheed Martin Tactical Systems Inc
Original Assignee
Loral Aerospace Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Loral Aerospace Corp filed Critical Loral Aerospace Corp
Publication of JPH0690263A publication Critical patent/JPH0690263A/ja
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/36—Modulator circuits; Transmitter circuits
    • H04L27/362—Modulation using more than one carrier, e.g. with quadrature carriers, separately amplitude modulated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/36—Modulator circuits; Transmitter circuits
    • H04L27/366—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator
    • H04L27/367—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator using predistortion
    • H04L27/368—Arrangements for compensating undesirable properties of the transmission path between the modulator and the demodulator using predistortion adaptive predistortion

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
JP5162018A 1992-07-01 1993-06-30 適応型信号変調システム Pending JPH0690263A (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/907151 1992-07-01
US07/907,151 US5237292A (en) 1992-07-01 1992-07-01 Quadrature amplitude modulation system with compensation for transmission system characteristics

Publications (1)

Publication Number Publication Date
JPH0690263A true JPH0690263A (ja) 1994-03-29

Family

ID=25423601

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5162018A Pending JPH0690263A (ja) 1992-07-01 1993-06-30 適応型信号変調システム

Country Status (5)

Country Link
US (1) US5237292A (de)
EP (1) EP0583059B1 (de)
JP (1) JPH0690263A (de)
CA (1) CA2092452C (de)
DE (1) DE69314877T2 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003515976A (ja) * 1999-11-23 2003-05-07 トムソン ライセンシング ソシエテ アノニム 変化するグループ化係数を有するヒエラキカルｑａｍ伝送システム
JP2004504748A (ja) * 2000-07-13 2004-02-12 サントル　ナショナル　デチュード　スパシアル（セー．エヌ．ウー．エス） 位相及び振幅のデジタル変調を行う回路とその方法
WO2004047393A1 (ja) * 2002-11-19 2004-06-03 Fujitsu Access Limited 利得差多重を用いた多重ｑａｍ変調装置、多重ｑａｍ復調装置、および通信方法
JP2007251808A (ja) * 2006-03-17 2007-09-27 Fuji Electric Holdings Co Ltd 信号発生回路
JP2009027441A (ja) * 2007-07-19 2009-02-05 Nippon Telegr & Teleph Corp <Ntt> 光送信回路
WO2009037794A1 (ja) * 2007-09-18 2009-03-26 National Institute Of Information And Communications Technology 直交振幅変調信号発生装置
JP2014099819A (ja) * 2012-11-16 2014-05-29 Nippon Telegr & Teleph Corp <Ntt> 無線通信システム、送信装置、受信装置、及び無線通信方法
JP2014515226A (ja) * 2011-04-14 2014-06-26 アルカテル−ルーセント 低次変調器を使用して高次変調方式を実施する方法および装置

Families Citing this family (60)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2697395B1 (fr) * 1992-10-22 1994-12-30 France Telecom Procédé de codage-décodage hiérarchique d'un signal numérique, et système correspondant utilisés en télévision numérique.
US5436930A (en) * 1993-06-14 1995-07-25 At&T Corp. Simultaneous analog and digital communications with a selection of different signal point constellations based on signal energy
US5684834A (en) * 1993-06-14 1997-11-04 Paradyne Corporation Simultaneous analog and digital communication using fractional rate encoding
US5475713A (en) * 1993-06-14 1995-12-12 At&T Corp. Shaped signal spaces in a simultaneous voice and data system
KR100311072B1 (ko) * 1993-08-31 2001-12-15 윤종용 다치중첩진폭변조의기저대역신호발생장치
US5598435A (en) * 1993-12-23 1997-01-28 British Telecommunications Public Limited Company Digital modulation using QAM with multiple signal point constellations not equal to a power of two
US5463355A (en) * 1994-07-15 1995-10-31 Loral Aerospace Corp. Wideband vector modulator which combines outputs of a plurality of QPSK modulators
KR100395584B1 (ko) * 1995-06-08 2004-02-11 코닌클리케 필립스 일렉트로닉스 엔.브이. 위상변조기와주파수멀티플라이어를갖는전송기를이용한전송시스템
CZ288335B6 (en) * 1995-06-28 2001-05-16 Deutsche Telekom Ag Modulation method and arrangement of circuits for transmission of data signals
US5825829A (en) * 1995-06-30 1998-10-20 Scientific-Atlanta, Inc. Modulator for a broadband communications system
EP0768782A1 (de) 1995-10-16 1997-04-16 Loral Aerospace Corporation Breitband-Mikrowellenvektormodulator
AU723589B2 (en) * 1995-10-25 2000-08-31 Loral Aerospace Corp Wideband vector modulator
SG104906A1 (en) * 1995-10-27 2004-07-30 Loral Aerospace Corp Wideband vector modulator
CN1074608C (zh) * 1995-10-30 2001-11-07 罗拉尔航天公司 宽带矢量调制器
US5612651A (en) * 1996-01-02 1997-03-18 Loral Aerospace Corp. Modulating array QAM transmitter
US5815531A (en) * 1996-06-12 1998-09-29 Ericsson Inc. Transmitter for encoded data bits
KR100558237B1 (ko) * 1996-06-12 2006-05-25 에릭슨 인크. Qam부호화된데이터용송신기
US6185259B1 (en) 1996-06-12 2001-02-06 Ericsson Inc. Transmitter/receiver for GMSK and offset-QAM
US6094415A (en) * 1996-06-20 2000-07-25 Lockheed Martin Corporation Vector division multiple access communication system
US5805567A (en) * 1996-09-13 1998-09-08 Lucent Technologies Inc. Orthogonal modulation scheme
US5956345A (en) * 1996-09-13 1999-09-21 Lucent Technologies Inc. IS-95 compatible wideband communication scheme
US6049572A (en) * 1996-12-30 2000-04-11 Intel Corporation Optimization of QAM constellation space for auxiliary I-Q signaling
US5867071A (en) * 1997-08-15 1999-02-02 Lockheed Martin Aerospace Corp. High power transmitter employing a high power QAM modulator
FR2776150B1 (fr) * 1998-03-13 2000-08-11 Thomson Csf Procede de radiodiffusion de signaux numeriques et emetteur de radiodiffusion pour la mise en oeuvre du procede
EP0982905B1 (de) * 1998-08-28 2005-08-10 Sony International (Europe) GmbH Vorrichtung und Verfahren zur universellen PSK-Modulation
GB9915417D0 (en) * 1999-07-02 1999-09-01 Nds Ltd Improvements in or relating to hierarchical coding
JP4359864B2 (ja) * 2000-04-03 2009-11-11 日本ビクター株式会社 直交周波数分割多重装置および直交周波数分割多重方法
US6674811B1 (en) * 2000-06-14 2004-01-06 Northrop Grumman Corporation Efficient pre-distorted 12/4 QAM modulator
US7209524B2 (en) * 2001-04-27 2007-04-24 The Directv Group, Inc. Layered modulation for digital signals
US7822154B2 (en) 2001-04-27 2010-10-26 The Directv Group, Inc. Signal, interference and noise power measurement
US7778365B2 (en) * 2001-04-27 2010-08-17 The Directv Group, Inc. Satellite TWTA on-line non-linearity measurement
US7483505B2 (en) 2001-04-27 2009-01-27 The Directv Group, Inc. Unblind equalizer architecture for digital communication systems
US7639759B2 (en) 2001-04-27 2009-12-29 The Directv Group, Inc. Carrier to noise ratio estimations from a received signal
FR2824205B1 (fr) * 2001-04-27 2004-11-05 Thomson Csf Procede de multiplication de frequence dans un equipement de radiocommunication
US7245671B1 (en) 2001-04-27 2007-07-17 The Directv Group, Inc. Preprocessing signal layers in a layered modulation digital signal system to use legacy receivers
US7173981B1 (en) 2001-04-27 2007-02-06 The Directv Group, Inc. Dual layer signal processing in a layered modulation digital signal system
US7423987B2 (en) * 2001-04-27 2008-09-09 The Directv Group, Inc. Feeder link configurations to support layered modulation for digital signals
US7184489B2 (en) 2001-04-27 2007-02-27 The Directv Group, Inc. Optimization technique for layered modulation
US7502430B2 (en) 2001-04-27 2009-03-10 The Directv Group, Inc. Coherent averaging for measuring traveling wave tube amplifier nonlinearity
US8005035B2 (en) 2001-04-27 2011-08-23 The Directv Group, Inc. Online output multiplexer filter measurement
US7583728B2 (en) 2002-10-25 2009-09-01 The Directv Group, Inc. Equalizers for layered modulated and other signals
US7471735B2 (en) 2001-04-27 2008-12-30 The Directv Group, Inc. Maximizing power and spectral efficiencies for layered and conventional modulations
US6593827B2 (en) * 2001-11-16 2003-07-15 Lockheed Martin Corporation Modulating array transmitter autocalibration method and system
US7095290B2 (en) 2001-12-18 2006-08-22 Nokia Corporation Method and system for generating higher order modulations with QPSK modulator
US7123663B2 (en) 2002-06-04 2006-10-17 Agence Spatiale Europeenne Coded digital modulation method for communication system
AR040366A1 (es) 2002-07-01 2005-03-30 Hughes Electronics Corp Mejora del rendimiento de la modulacion jerarquica por desplazamiento de ocho fases (8psk)
ES2604453T3 (es) 2002-07-03 2017-03-07 The Directv Group, Inc. Método y aparato para modulación en capas
US7474710B2 (en) 2002-10-25 2009-01-06 The Directv Group, Inc. Amplitude and phase matching for layered modulation reception
AU2003301717A1 (en) 2002-10-25 2004-05-25 The Directv Group, Inc. Lower complexity layered modulation signal processor
US7529312B2 (en) 2002-10-25 2009-05-05 The Directv Group, Inc. Layered modulation for terrestrial ATSC applications
US7463676B2 (en) * 2002-10-25 2008-12-09 The Directv Group, Inc. On-line phase noise measurement for layered modulation
US20080118003A1 (en) * 2002-11-13 2008-05-22 Industrial Technology Research Institute Enhanced Wireless Communication System and Method Thereof
US7502429B2 (en) 2003-10-10 2009-03-10 The Directv Group, Inc. Equalization for traveling wave tube amplifier nonlinearity measurements
US7680213B2 (en) * 2004-04-14 2010-03-16 Nokia Corporation Generating higher order modulation using QPSK modulations
US7078981B2 (en) * 2004-07-27 2006-07-18 Lucent Technologies Inc. 16 QAM modulator and method of 16 QAM modulation
CN101370160B (zh) * 2007-08-13 2011-12-21 电信科学技术研究院 一种tfci信息的调制方法及装置
US9344196B1 (en) 2009-05-28 2016-05-17 Freedom Photonics, Llc. Integrated interferometric optical transmitter
US8401405B2 (en) * 2009-05-28 2013-03-19 Freedom Photonics, Llc. Monolithic widely-tunable coherent receiver
US10320152B2 (en) 2017-03-28 2019-06-11 Freedom Photonics Llc Tunable laser
WO2021003019A1 (en) * 2019-07-03 2021-01-07 The Regents Of The University Of California Quadrature phase shift keying quadrature amplitude modulation transmitter

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5125303B1 (de) * 1971-02-10 1976-07-30
US4039961A (en) * 1974-09-12 1977-08-02 Nippon Telegraph And Telephone Public Corporation Demodulator for combined digital amplitude and phase keyed modulation signals
US4168397A (en) * 1978-05-26 1979-09-18 Gte Automatic Electric Laboratories Incorporated 8-Phase PSK modulator
US4291277A (en) * 1979-05-16 1981-09-22 Harris Corporation Adaptive predistortion technique for linearizing a power amplifier for digital data systems
US4464767A (en) * 1981-09-08 1984-08-07 Paradyne Corporation System for generation of multiple pointed QAM signal spaces by use of synchronous Qam transmitters
FR2539261B1 (fr) * 1983-01-07 1989-07-13 Telecommunications Sa Emetteur pour faisceaux hertziens numeriques a multi-etats
JPS6436153A (en) * 1987-07-31 1989-02-07 Nec Corp Quadruple phase modulator
FR2622376B1 (fr) * 1987-10-21 1990-01-26 Verdot Georges Modulateur par deplacement de phase a quatre etats, notamment pour modulation d'amplitude a deux porteuses en quadrature a grand nombre d'etats
US4804931A (en) * 1987-12-11 1989-02-14 Acrodyne Industries, Inc. Digital amplitude modulator - transmitter

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003515976A (ja) * 1999-11-23 2003-05-07 トムソン ライセンシング ソシエテ アノニム 変化するグループ化係数を有するヒエラキカルｑａｍ伝送システム
JP2004504748A (ja) * 2000-07-13 2004-02-12 サントル　ナショナル　デチュード　スパシアル（セー．エヌ．ウー．エス） 位相及び振幅のデジタル変調を行う回路とその方法
WO2004047393A1 (ja) * 2002-11-19 2004-06-03 Fujitsu Access Limited 利得差多重を用いた多重ｑａｍ変調装置、多重ｑａｍ復調装置、および通信方法
JP2007251808A (ja) * 2006-03-17 2007-09-27 Fuji Electric Holdings Co Ltd 信号発生回路
JP2009027441A (ja) * 2007-07-19 2009-02-05 Nippon Telegr & Teleph Corp <Ntt> 光送信回路
WO2009037794A1 (ja) * 2007-09-18 2009-03-26 National Institute Of Information And Communications Technology 直交振幅変調信号発生装置
JP2009094988A (ja) * 2007-09-18 2009-04-30 National Institute Of Information & Communication Technology 直交振幅変調信号発生装置
US8676060B2 (en) 2007-09-18 2014-03-18 National Institute Of Information And Communications Technology Quadrature amplitude modulation signal generating device
JP2014515226A (ja) * 2011-04-14 2014-06-26 アルカテル−ルーセント 低次変調器を使用して高次変調方式を実施する方法および装置
JP2014099819A (ja) * 2012-11-16 2014-05-29 Nippon Telegr & Teleph Corp <Ntt> 無線通信システム、送信装置、受信装置、及び無線通信方法

Also Published As

Publication number Publication date
EP0583059A1 (de) 1994-02-16
US5237292A (en) 1993-08-17
EP0583059B1 (de) 1997-10-29
DE69314877D1 (de) 1997-12-04
DE69314877T2 (de) 1998-04-30
CA2092452A1 (en) 1994-01-02
CA2092452C (en) 2003-02-04

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